Let's divide 20871791 by 811
We want to divide 20871791 by 811.

Moving on to step 1:
If we divide 2 by 811, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 811

On to step 2:
811 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Grab the next digit (8) from the dividend, add it to 20, then carry on: 208 / 811

Going ahead to step 3:
If we divide 208 by 811, we get 0 and a remainder of 208.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 208 to get 208.
Include the next digit (7) from the dividend after 208, then repeat: 2087 / 811

On to step 4:
811 can be fit into 2087 2 times, resulting in a remainder of 465.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1622 from 2087, we get 465.
Fetch the next digit (1) from the dividend, attach it to 465 and continue: 4651 / 811

Going ahead to step 5:
When dividing 4651 by 811, we get 5 with a remainder of 596.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Deduct 4055 from 4651 and we're left with 596.
Take the next digit (7) from the dividend and append it to 596, then repeat: 5967 / 811

Advancing to step 6:
811 goes into 5967 7 times with a remainder of 290.
Put 7 as the next digit of the answer. 
Result so far: 257.0
If we take 5677 away from 5967, we end up with 290.
Append the next digit (9) from the dividend to 290 and continue with: 2909 / 811

Let's proceed to step 7:
811 goes into 2909 3 times with a remainder of 476.
Record the quotient 3 as the next digit in the result. 
Result so far: 2573.0
The remainder is 476 after subtracting 2433 from 2909.
Grab the next digit (1) from the dividend, add it to 476, then carry on: 4761 / 811

Let's proceed to step 8:
811 can be fit into 4761 5 times, resulting in a remainder of 706.
The next digit of our result is 5. 
Result so far: 25735.0
If we subtract 4055 from 4761, we get 706.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7060, and continue the process.

Step 9:
7060 divided by 811 is 8 with a remainder of 572.
Use 8 as the next digit of our solution. 
Result so far: 25735.8
Subtracting 6488 from 7060 leaves us with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Going ahead to step 10:
When dividing 5720 by 811, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 25735.87
Subtract 5677 from 5720 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 11:
The number 811 fits into 430 0 times, leaving a remainder of 430.
The next digit of our result is 0. 
Result so far: 25735.87
The remainder is 430 after subtracting 0 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 12:
811 goes into 4300 5 times with a remainder of 245.
Put 5 as the next digit of the answer. 
Result so far: 25735.8705
Deduct 4055 from 4300 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Advancing to step 13:
811 goes into 2450 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 25735.87053
Subtract 2433 from 2450 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 14:
When dividing 170 by 811, we get 0 with a remainder of 170.
The number 0 becomes the next digit in our result. 
Result so far: 25735.87053
Deduct 0 from 170 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 15:
The number 811 fits into 1700 2 times, leaving a remainder of 78.
The next digit of our result is 2. 
Result so far: 25735.8705302
Deduct 1622 from 1700 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 16:
If we divide 780 by 811, we get 0 and a remainder of 780.
Use 0 as the next digit of our solution. 
Result so far: 25735.8705302
Subtract 0 from 780 to get 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

The final result is 25735.8705302 with a remainder of 7.8e-07.